Catalog # KA0027, LEPR (Human) ELISA Kit is a double monoclonal sandwich enzyme immunoassay for the quantitative measurement of human Leptin receptor in serum, plasma and tissue culture medium. Abnova, the company for which we distribute this product, indicated that the antibodies present in this ELISA were raised against the extracellular domain of Leptin Receptor. Thus, this ELISA should be capable of detecting soluble leptin receptor.